正则表达式删除方括号内的逗号和空格

Question

Hello I have a file that looks like this:

year.", [229, 338], null, [1144, 2371]
year....", null, null, [812]
year:, null, null, [1019, 1028, 2463]
year;, null, [164], [1052]

This what I would like the file to look like

year.", 229:338, , 1144:2371
year....", , , 812
year:, , , 1019:1028:2463
year;, , 164, 1052

I have tried .replaceAll(",[?=[^()]*\\\\]]",":") but this is just replacing all of the commas not the ones inside of the bracket.

Answer 1

It looks like you want to

• remove all null s
• replace number, number, number with number:number:number , in other words replace each , which has digit before it with :
• remove [ and ]

Demo:

String input = 
        "year.\", [229, 338], null, [1144, 2371]\r\n" + 
        "year....\", null, null, [812]\r\n" + 
        "year:, null, null, [1019, 1028, 2463]\r\n" + 
        "year;, null, [164], [1052]";

String expected = 
        "year.\", 229:338, , 1144:2371\r\n" + 
        "year....\", , , 812\r\n" + 
        "year:, , , 1019:1028:2463\r\n" + 
        "year;, , 164, 1052";

input = input.replace("null", "")
             .replaceAll("(?<=\\d), ", ":")
             .replaceAll("\\[|\\]", "");

System.out.println(input.equals(expected));

Output: true .